package fr.unice.server;import javax.jdo.JDOHelper;import javax.jdo.PersistenceManager;import javax.jdo.PersistenceManagerFactory;public final class PMF {	private static final PersistenceManagerFactory pmfInstance = JDOHelper			.getPersistenceManagerFactory("transactions-optional");	private PMF() {	}	public static PersistenceManagerFactory get() {		return PMF.pmfInstance;	}	public static PersistenceManager getPersistenceManager() {		return PMF.get().getPersistenceManager();	}}